if (document.images)
   {
	 menu01on= new Image(196,33);
     menu01on.src="images/menu_selected_01.gif";  
     menu01off= new Image(196,33);
     menu01off.src="images/menu_01.gif";  

     menu02on= new Image(196,33);
     menu02on.src="images/menu_selected_02.gif";  
     menu02off= new Image(196,33);
     menu02off.src="images/menu_02.gif";  

     menu03on= new Image(196,33);
     menu03on.src="images/menu_selected_03.gif";  
     menu03off= new Image(196,33);
     menu03off.src="images/menu_03.gif";  

     menu04on= new Image(196,33);
     menu04on.src="images/menu_selected_04.gif";  
     menu04off= new Image(196,33);
     menu04off.src="images/menu_04.gif";  

     menu05on= new Image(196,33);
     menu05on.src="images/menu_selected_05.gif";  
     menu05off= new Image(196,33);
     menu05off.src="images/menu_05.gif";  

     menu06on= new Image(196,33);
     menu06on.src="images/menu_selected_06.gif";  
     menu06off= new Image(196,33);
     menu06off.src="images/menu_06.gif";  

     menu07on= new Image(196,33);
     menu07on.src="images/menu_selected_07.gif";
     menu07off= new Image(196,33);
     menu07off.src="images/menu_07.gif";



   }

function turnon(imgName)
 {
   if (document.images)
    {
      eval("document.images['" + imgName + "'].src="+imgName+"on.src;");
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      eval("document.images['" + imgName + "'].src="+imgName+"off.src;");
    }
 }